So i did a complete clean of my laptop lenovo z510, and i wanted to install win10. My bios settup is legacy first, the sata is on AHCI, and when im trying to boot from USB (with SATA on AHCI) there is 0mb avalible on my disk at the "where do you want to install windows?" tab, and when the SATA is on IDE (compatible) there are no drivers found (I need to find the drivers or install them via. another usb) what am i doing wrong?